feat: add diagnostics and telemetry runtime

tests/unit/application-boundary.test.ts

@@ -36,6 +36,7 @@ describe("application input/output boundary", () => {
   it("uses fake output ports for preference, session, and safe diagnostics flows", () => {
     const write = vi.fn(() => ({ ok: true as const }));
     const emit = vi.fn();
+    const record = vi.fn();
     const ports = {
       session: {
         getState: () => "authenticated" as const,
@@ -49,7 +50,8 @@ describe("application input/output boundary", () => {
         write,
         remove: () => ({ ok: true as const }),
       },
-      diagnostics: { emit },
+      diagnostics: { record },
+      telemetry: { emit },
       releaseInfo: {
         getCurrent: async () => ({
           buildId: "build-a",
@@ -82,20 +84,43 @@ describe("application input/output boundary", () => {
       buildId: "build-a",
       boundaryName: "route",
     });
+    expect(record).toHaveBeenCalledWith({
+      level: "error",
+      eventId: "ui.render.failed",
+      context: {
+        route_id: "APP_HOME",
+        build_id: "build-a",
+        component_boundary: "route",
+      },
+    });
     expect(emit).toHaveBeenCalledWith("ui.render.failed", {
       route_id: "APP_HOME",
       build_id: "build-a",
       component_boundary: "route",
     });
+    application.diagnostics.reportRouteChanged({
+      routeId: "APP_HOME",
+      buildId: "build-a",
+    });
+    expect(record).toHaveBeenCalledWith({
+      level: "info",
+      eventId: "route.changed",
+      context: { route_id: "APP_HOME", build_id: "build-a" },
+    });
   });
 
   it("does not let a failing diagnostics output escape into presentation", () => {
     const application = createTestApplication({
       diagnostics: {
-        emit() {
+        record() {
           throw new Error("sink details");
         },
       },
+      telemetry: {
+        emit() {
+          throw new Error("telemetry details");
+        },
+      },
     });
 
     expect(() =>